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[Bug target/65181] Support for alloca in nvptx


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65181

--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Mon Feb 23 17:51:41 2015
New Revision: 220915

URL: https://gcc.gnu.org/viewcvs?rev=220915&root=gcc&view=rev
Log:
[PR target/65181] nvptx libgcc: Prevent building "advanced" stuff (for example,
gcov support)

When building GCC against a proper newlib sysroot, the libgcc build will
include more than what's built in the -Dinhibit_libc configuration used when
building newlib as part of the GCC build process.  See the inhibit_libc logic
in gcc/configure.ac.

To avoid...

    ptxas _gcov_indirect_call_topn_profiler.o, line 101; error   : Type or
alignment of argument does not match formal parameter 'ptr'
    ptxas _gcov_indirect_call_topn_profiler.o, line 101; error   : Call has
wrong number of parameters
    ptxas _gcov_indirect_call_topn_profiler.o, line 101; error   : Type or
alignment of argument does not match formal parameter 'size'
    ptxas fatal   : Ptx assembly aborted due to errors
    nvptx-as: ptxas returned 255 exit status
    make[2]: *** [_gcov_indirect_call_topn_profiler.o] Error 1

..., "dumb down" the libgcc build:

    libgcc/
    PR target/65181
    * config/nvptx/t-nvptx (INHIBIT_LIBC_CFLAGS): Define to
    -Dinhibit_libc.

Modified:
    trunk/libgcc/ChangeLog
    trunk/libgcc/config/nvptx/t-nvptx


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